A vitamin C serum is one of the most consistently recommended actives in skincare, and for good reason. If dull complexion and uneven skin tone are the concerns sitting at the top of your routine, a vitamin C serum for dull skin and uneven tone is typically the first place a skincare editor or dermatologist will point you. It addresses both at the source: brightening the surface while working beneath it to support a more even, luminous-looking complexion over time. In this guide, we cover exactly what it does, how to apply it correctly, what to look for in a...